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Experimental linear-optical implementation of a multifunctional optimal qubit cloner
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SYSNO ASEP 0387569 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Experimental linear-optical implementation of a multifunctional optimal qubit cloner Tvůrce(i) Lemr, K. (CZ)
Bartkiewicz, K. (PL)
Černoch, A. (CZ)
Soubusta, Jan (FZU-D) RID, ORCID
Miranowicz, A. (PL)Zdroj.dok. Physical Review. A. - : American Physical Society - ISSN 1050-2947
Roč. 85, č. 5 (2012), "050307-1"-"050307-4"Poč.str. 4 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova quantum cloning ; qubit cloner Vědní obor RIV BH - Optika, masery a lasery CEZ AV0Z10100522 - FZU-D (2005-2011) UT WOS 000304478400001 DOI 10.1103/PhysRevA.85.050307 Anotace We present the first experimental implementation of a multifunctional device for the optimal cloning of one to two qubits. Previous implementations have always been designed to optimize the cloning procedure with respect to one single type of a priori information about the cloned state. In contrast, our "all-in-one" implementation is optimal for several prominent regimes such as universal cloning, phase-covariant cloning, and also the first ever realized mirror phase-covariant cloning, when the square of the expected value of Pauli's Z operator is known in advance. In all these regimes the experimental device yields clones with almost maximum achievable average fidelity (97.5% of theoretical limit). Our device has a wide range of possible applications in quantum information processing, especially in quantum communication. Pracoviště Fyzikální ústav Kontakt Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Rok sběru 2013
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